User exit can only be used if branch point exists

What causes this issue?

You tried to activate the <DS:DE.J_7LBOM_REMOTE_KZ>user exit</> for a
distributed BOM explosion, without the preliminary Customizing settings
having been completed.

System Response

The user exit cannot be activated.

How to fix this error?

Check the entries for the key SAPMJ7LM/1 and J7LC/1 in
<DS:TRAN.J7LRRE711000150>REA Customizing -> Adjustment ->
Customer-Specific Enhancements</>.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.